20972168

素因数分解:

$2^3\times 7^1\times {\mathrm{487}}^1\times {\mathrm{769}}^1$

素因数の和:1269

約数の個数: 32

約数和(自身を含む): 45091200

約数和(自身を除く): 24119032

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 487, 769, 974, 1538, 1948, 3076, 3409, 3896, 5383, 6152, 6818, 10766, 13636, 21532, 27272, 43064, 374503, 749006, 1498012, 2621521, 2996024, 5243042, 10486084, 20972168]

約数ペア:

[(1, 20972168), (2, 10486084), (4, 5243042), (7, 2996024), (8, 2621521), (14, 1498012), (28, 749006), (56, 374503), (487, 43064), (769, 27272), (974, 21532), (1538, 13636), (1948, 10766), (3076, 6818), (3409, 6152), (3896, 5383)]